Ore-concentrator



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ORE GONGENTRATOR. No. 515,495. Patented Feb. 27, 1894.

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ORE OONGENTEATOR. No. 515,495. Patented Feb. 27, 1894.

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THOMAS J. LOVETT, OF CHICAGO, ILLINOIS.

ORE-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 515,495, dated February 27, 1894. Application filed April 24, 1393. Serial No. 471,657- (No model.)

To all whom it may concern.-

lie it known that I, THOMAS J. LOVETT, a citizen of the United States, residing at Chicage, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Ore-Concentrators, of which the following is a specification.

Myinvention relates to an improvement in the class of concentrators in which a ribbed apron is supported on a frame and caused to travel, the frame being provided with means for agitating it and,with it, the apron,f0r the purpose of producing a species of agitation of the apron resembling, and to produce the efiect of, the so-cal1ed hand-pan motion.

The objects of my improvement are to provlde a concentrator which shall, in operation, have motions resembling and producing the effect of the desired hand-pan motion in an exceptionally high degree; and to provide a concentrator of peculiar efficiency, due to my improvement as to the general construction of the device as well as to details thereof.

Referring to the accompanying drawings Flgurel is a view in side elevation of my improved concentrator. Fig. 2 is a plan view of the vibratory frame with the apron removed. Fig. 3 is a broken view in perspective of a section of the apron. Fig. 4 is a plan of the rotary eccentric guide for one end of the apron-frame; and Figs. 5 and 6 are sections of an ore-feeding attachment for the concentrator.

A is the frame shown as rectangular in form and which I prefer to make of cylindrical metal tubing. A bumper B, terminating 1n an elastic head 7', extends backward from one end of the frame to be caused by one of 1ts movements to strike a stationary obstruction 13' for jolting the ore to be concentrated on the apron. Near the opposite ends of the frame are journaled, to extend between its sides, the drums or cylinders G and 0, about which passes the endless apron D, composed, by preference, of a canvas body with a ruboer facing, the facing being formed with ribs g extending transversely of the apron.

E is a counter-shaft journaled near its opposite ends in bearings 19 and p on the frame A and carrying a pulley 0 having a belt-connection o with a pulley 0 on a shaft 0 journaled in rigid hangers 0 depending from opposite sides of the frame, the shaft carrying, to rotate with it and against the adjacent surface of the apron, a cylindrical brush F. A worm-shaft E is journaled in bearings 13 and 19 110 extend parallel with the shaft E and has its worm E engaging a worm-wheel E on the axis of the apron-cylinder C. The shaft E receives motion from the shaft E, by gearing the two together at the cone-pulleys m and m, carried by them, respectively; and

for supporting the upper section of the apron D, I provide underneath it a desired number of bearing-rollers so.

For taking up slack in the apron D I provide a tightening device G shown as a lever- 12 journaled at one end on the shaft of the cylinder 0 and carrying between its ends one end of a roller n (the opposite end of the roller being similarly supported) beyond which, where the lever coincides with the bearing 12, it is adapted to have a pin passed through it, as indicated in Fig. 1, to enter any one of a vertical series of perforations n in the bearing according to the requirement in adjusting the device Gto accomplish its purpose.

At the forward end of the frame A, or that opposite the one provided with the bumper B, is a depending stud A which enters one of the eccentric sockets Zin a horizontally rotating head H, shown as a pulley, journaled on a base H. Several of these sockets Z are shown at different distances from the center of rotation of the head H, into either of which the stud maybe inserted to vary, according to desire, the degree of eccentric motion of the frame.

I denotes a flush-water or sprinkling attachment surmounting the apron D and which may involve any suitable or well-known construction of such devices for concentrators;

and K is a feeding attachment for the ore to the ribbed apron.

While various forms of ore-feed may be used with my improved construction of concentrator, I prefer the construction of that illustrated in Figs. o'and 6, whereby it is rendered an amalgamating feeder, which operates best by providing means for passing an electriccurrent'through the mercury to energize it and thus increase its amalgamating efficiency. The amalgamating ore -feeder described, flexibly suspending the frame from overhead near its opposite ends, the suspending means for one end being eccentrioally connected with pulleys on the adjacent overhead shaft, and a rotary head H engaged eeoentrioally by the stud A and geared to the shaft L, substantially as and for the purpose set forth.

3. In an ore-concentrator, the combination of a frame A having a stud A at one end and a bumper B at itsopposite end and carrying an endless transversely ribbed traveling apron D, overhead rotary shafts L and, a geared together and with the driving power and apron-driving means, a rotary head H supported in horizontal position near one end of the frame and engaged eccentrically by the stud A, and geared to the shaft L, rods M flexibly suspending the frame at one end from overhead and containing turn-buckles, pulleys g on the shaft L, and rods M conneoting the frame from its opposite end eccen-' trically with the pulleys g, substantially as described.

4. An ore-concentrator comprising, in combination, a frame A having a stud A at one end, a bumper B at its opposite end and can rying cylinders G and 0- about which extends the transversely ribbed apron D, a rotary head H supported in horizontal position near one end'of the frame and engaged eccentrioally by the said stud, an overhead driving shaft L geared with the said head and carrying pulleys g,rods M flexibly suspending the frame at one endfrom overhead and containing turn buckles, rods M connecting the frame from its opposite end eocentrically with the pulleys g and containing turn-buckles, a rotary shaft E on the frame, geared with the said driving-shaft and a rotary shaft E there on geared to the shaft E and having a wormgear connection with the shaft of cylinder 0, a tightener for the apron, a rotary brush F geared with the shaft E, and flushing means I for the bolt, the whole being constructed and arranged to operate substantially as described.

THOMAS J. LOVETT.

In presence of M. J. Fnosr, W. N. WILLIAMS. 

